<template>
  <el-card class="box-card">
    <div slot="header" class="clearfix">
      <span>更换头像</span>
    </div>
    <div>
      <!-- 图片，用来展示用户选择的头像 -->
      <img v-if="avatar" :src="avatar" alt="" class="preview" />
      <img
        v-else
        src="../../../assets/images/avatar.jpg"
        alt=""
        class="preview"
      />
      <input
        type="file"
        accept="image/*"
        hidden
        ref="inputFile"
        @change="cImage"
      />
      <!-- 按钮区域 -->
      <div class="btn-box">
        <el-button type="primary" icon="el-icon-plus" @click="oImage"
          >选择图片</el-button
        >
        <el-button
          type="success"
          icon="el-icon-upload"
          :disabled="avatar === ''"
          @click="uploadAvatar"
          >上传头像</el-button
        >
      </div>
    </div>
  </el-card>
</template>

<script>
export default {
  name: "UserAvatar",
  data() {
    return {
      avatar: "",
    };
  },
  methods: {
    oImage() {
      this.$refs.inputFile.click();
    },
    cImage(e) {
      const file = e.target.files;
      if (file.length === 0) {
        this.avatar = "";
      } else {
        const fr = new FileReader();
        fr.readAsDataURL(file[0]);
        // fr.onload = (e) => {
        //   this.avatar = e.target.result;
        // };

        fr.addEventListener("load", () => {
          this.avatar = fr.result;
        });
      }
    },
    async uploadAvatar() {
      const { data: res } = await this.$http.patch("/my/update/avatar", {
        avatar: this.avatar,
      });
      if (res.code !== 0) return this.$message.error(res.message);
      this.$message.success(res.message);
      this.$store.dispatch("getUserInfo");
    },
  },
};
</script>

<style lang="less" scoped>
.btn-box {
  margin-top: 10px;
}
.preview {
  object-fit: cover;
  width: 350px;
  height: 350px;
}
</style>
